Should be a fun run though, with the trails you are talking about. I've run a couple of the ones you're talking about, and have seen pics of the others. The trails give alot of scenic views to look at, but also a couple fun spots as well. These are great trails to break in the next generation of Jeepers.

Start at either end of Switzerland, shoot up to Pennsylvania Gulch, head North on the Peak to Peak HW for ~2-3 miles, take a left towards Rainbow Lakes and head South on Caribou, take that until you reach the Eldorado Trail and head SW on there into Eldora where ya air up...

This is not a bad idea at all. You have to get to Caribou/Eldorado some how anyway. I have never been on Switz/Penns and would like to just to say I have. And for Caribou/Eldorado, these are my favorites in the area just becasue they were the first 2 trails that I ran.

So Saturday or Sunday work best? I like Saturday just in case I break my junk. Also, easier to get the kid washed up Sunday and ready for daycare on Monday if we're home. Can stay out a little later on Saturday.

Start at either end of Switzerland, shoot up to Pennsylvania Gulch, head North on the Peak to Peak HW for ~2-3 miles, take a left towards Rainbow Lakes and head South on Caribou, take that until you reach the Eldorado Trail and head SW on there into Eldora where ya air up...